Aged at least
In general, the longer bourbon ages in charred-oak barrels, the more mellow it becomes. The law says bourbon must be aged for at least two years, but time is only one variable that affects how whiskey ages. For example, due to the extreme temperature differences between seasons, a whiskey aged in Kentucky will mature much faster than one aged somewhere with a more temperate climate, like Scotland. In fact, one might say that a couple years in Kentucky is equal to twice that long in Scotland. Here at Jim Beam, we always age our bourbon at least twice as long as the law requires for a more mature, extra-mellow flavor.